000			00336nam a2200133Ia 4500
008			160509s9999 xx 000 0 und d
020			_a0-443-01932-0
100			_aBarker, D J P
245			_aPractical Epidemiology
250			_a2nd Ed.
260			_bThe English Lanugage Book Society _c1976
300			_a180p.
650			_aEpidemiology
999			_c1794 _d1794